Cord and method of making cord



` w, MANN CORD AND METHOD 'OF'V MAKING CORD Filed June l5, 1944 INVENTOF? s. M. MARUN Patented July 9, 1946 PATENT OFFICE CORD AND METHODOF MAKING CORD Samuel M. Martin, Baltimore, Md., assignor to WesternElectric Company, Incorporated, New York, N. Y., a corporation of NewYork Application .l une 16,

6 Claims. 1

This invention relates to cords and methods of making cords, and has forits object the provisions of new and improved cords and new and improvedmethods of making cords.

A method embodying the invention comprises bending a single insulatedconductor into the form of a V, positioning a second insulated conductoralong the portion of the first-mentioned conductor which forms one armof the V, positioning a third insulated conductor along the portion ofthe first-mentioned conductor forming the other arm of the V, andsecuring together the central portions of the three conductors to form aY.

A complete understanding of the invention may be obtained from thefollowing detailed description of one embodiment thereof, when read inconjunction with the appended drawing, in which:

Fig. l is a plan view of a plurality oi components of a Y-type cordembodying the invention during an early stage of the process of makingsuch cords;

Fig. 2 is a plan view of the cord during a more advanced stage of themanufacturethereof;

Fig. 3 is a plan View of the cord in a further completed stage of itsmanufacture;

Fig. 4 is a plan view of the completed cord, and

Fig. 5 is an enlarged vertical sectional view of the cord taken on theline 5--5 of Fig. 4.

In accordance with one method embodying the invention, an end of anindividually insulated conductor I5 (Fig. 1) is doubled back upon theother end thereof to position it substantially in the shape of a V. Aninsulated conductor III is placed along one end portion of the conductorI5 and a third insulated conductor I I is placed along the other endportions of the conductor I5.

A tube I2 (Fig. l) composed of a suitable thermoplastic insulating andweatherproong material then is slid over the conductor Ill and theportion of the conductor 4I5 adjacent thereto. The insulating andweatherproof-ing material may be composed of one of the polymerizedvinyl compounds, such as are sold under the trade names of Koroseal andVinylita A second tube I3 identical with the tube I2 then is placed overthe conductor II and the portion of the conductor I5 positioned alongthe conductor II.

A block I9 (Figs. l and 5) composed of a suitable insulating, resinousmaterial such as one of the phenolic resins, has a pair of grooves20--29 of a depth greater than the diameter of the tubes I2 and I3formed therein and has formed thereon a tapered end 2|. The intermediateportions of 1944, Serial No. 540,695

the tubes I2 and I3 are placed in the grooves 2li-20, as shown in Fig.2, and the tubes are iirmly secured together at each end of the block I9by lashings 23 and 24 to secure the block I9 therebetween.` I

A textile covering 32 (Figs. 4 and 5) is then braided from the lashing24 over the block I9 to the lashing 23, whereupon the braiding isreversed and continued back over the block I9, the lashing 24, the tubesI2 and I3, and is finally terminated in a hollow, braided tube 33 (Fig.4). The tube 33 is doubled to form a looped portion 34 and is secured inthat position by a Whipping 35. The looped portion 34 serves as afastening element for the cord.

A plurality of solderless tips 36-36 then may be attached by methodswell known in the art to the ends of the insulated conductors I0, II andI5. A pair of whippings 3l and 38 then are served around the ends of thetubes I2 and I3, respectively, to hold the ends of the tubes in closecontact with the conductors I0, II and I5 and prevent those conductorsfrom being spread at the end portions of the tubes.

The block I9 serves as a sturdy support for a clip (not shown) or othersecuring means and protects from wear the portions of the tubes I2 andI3 placed in the grooves 2li-20. The lashings 23 and 24 prevent thetubes I2 and I3 from being pulled apart during use of the Y-type cordsformed by the method described hereinabove.

Y-type cords made by the above described method have only continuousconductors included therein, and, since no splices are included in suchcords, the time andcost of making such cords are Very low, and the cordsare uniformly high in quality.

What is claimed is:

1. A Y-type cord, which comprises an insulated conductor doubled backupon itself, a second insulated conductor extending along one of thedoubled-back portions of the rst-mentioned conductor, a third insulatedconductor extending along the other of the doubled-back portions of theErst-mentioned conductor, a preformed tube oi weatherproong materialsurrounding the second conductor and the portion of the first-mem tionedconductor extending therealong, a second preformed tube ofweatherproofing material surrounding the third conductor and the portionof the first-mentioned conductor extending therealong, and means forsecuring the tubes together at points intermediate of the ends thereof.

2. A Y-type cord, which comprises an insulated 55 4conductor doubledback upon itself, a second insulated conductor placed along one of thedoubled-back portions of the iirst-menticned conductor, a thirdinsulated conductor placed along the other of the doubled-back portionsof the first-mentioned conductor, a pair of preformed tubes of athermoplastic material, one of said tubes serving to surround the secondconductor and the doubled-back portion of the first-mentioned conductorextending therealong, the other of said tubes serving to surround thethird conductor and the doubled-back portion of the first-mentionedconductor extending therealong, a non-conducting block having groovesformed therein, and means for securing the central portions of the tubeswithin the grooves.

3. A Y-type cord, which comprises an insulated conductor doubled backupon itself, a second insulated conductor placed along one of thedoubled-back portions of the first-mentioned conductor, a thirdinsulated conductor placed along the other of the doubled-back portionsof the mst-mentioned conductor, a preformed weatherproong tube enclosingthe second conductor and the doubled-back portion of the rst-mentionedconductor extending therealong, a second preformed Weatherproong tubeenclosing the third conductor and the other portion of theiirst-mentioned conductor extending therealong, a nonconducting blockhaving a pair of grooves of a depth greater than the diameter of thetubes formed in opposite sides thereof, and means for securing the tubestogether at both ends of the block to secure the tubes in said grooves.

4. A Y-type cord, which comprises an insulated conductor doubled backupon itself, a second insulated conductor extending along a doubledbackportion of the first-mentioned conductor, a third insulated conductorextending along the other of the doubled-back portions of therstmentioned conductor, a pair of tubes composed oi polymerized vinylcompound, one of said tubes enclosing one doubled-back portion of thefirstmentioned conductor and the conductor extending therealong, theother of said tubes enclosing the other doubled-back portion of thefirst-mentioned conductor and the conductor extending therealong, anelongated and tapered filler body having a pair of grooves formed alongthe opposite sides thereof and composed of phenolic resin, a pair oflashings disposed at opposite ends of the body for securing the tubestogether and in said grooves, a braided textile covering formed over thebody and the portions o f the tubes extending i'rorn one end thereof andterminating in a hollow braided portion, and awhipping for securing saidhollow braided portion in the form of a loop.

5. The method of forming Y-type cords, which comprises bending aninsulated Conductor into the shape of a V, placing the conductor along apair of individually insulated conductors with the last-mentionedconductors extending along the portions of the rst-mentioned conductorforming the arms of the V, enclosing one arm of the V and the conductorextending therealong in a preformed cover of Weatherproong material,enclosing the other arm of the V and the conductor extending therealongin a second preformed cover of Weatherprooiing material, securing thecentral portions of the covers together, and securing a non-conductingiiller plug to the central portions of the covers.

6. The method of forming Y-type cords, which comprises bending aninsulated conductor into the shape oi a V, placing a pair ofindividually insulated conductors along the portions of thefirst-mentioned conductor forming the arms of the V, enclosing one armof the V and the conductor extending therealong in a preformed tubularcover of Weatherproofing material, enclosing the other arm of the V andthe conductor extending therealong in a second preformed tubular coverof Weatherprooilng material, placing the intermediate portions of thecovers into a pair of grooves formed in opposite sides of anonconducting block, securing the covers together at each end of theblock, braiding a textile covering over the block, one end of each coverextending therefrom and beyond said end to form a braided tube, doublingthe braided tube upon itself, and lashing' the doubled portions of thehollow braided tube to form a loop.

SAMUEL M. MARTIN.

